Stroke-regulator for windmills



A. B. SABIN. STROKE REGULATOR FOR WINDMILLS. IAPPLIICATION'FILEDI JUNE 21,1920 1,378,621 Patented May 17, 1921.

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2 SHEEIS-SHEET 2.

Inventor:

UNITEDisTATEs PATENT I OFFICE.

ALFRED B. SABIN, or LARAMIE, WYOMING.

STROKE-REGULATOR FOR WINDMILLS.

To all whom 2'2, may concern:

Be it known that I, ALFRED B. SAB IN, a

citizen ofthe United States, residing in the any other device actuated by a reciprocating movement. While the invention may be used in connection with different kinds of machinery, it is described in the following specification as applied to a wind mill. The general object of the invention is to provide a very simple and compact regulator which will operate automatically to adjust the crank arm to which the connecting rod is attached that operates the pump. A special object of the invention has been to produce aconstruction in which the crank pin will be securely held in any of its adjusted positions and without the presence of any lost motion; and also to construct the device in such a way that the adjusting mechanism is a locked mechanism as regards thecrank pin, so that the crank pin can exert its force on the connecting rod 'without'being moved in the slightest degree from its path of movement by the forces developed in the connecting rod; also to construct the crankarm in a simple manner which will facilitate the mounting of the parts of the'mechanism within it. l I I Further objects of the inventlon Wlll ap- 7 pear hereinafter.

Thev invention consists in the novel features, and inthe, general combination of parts to be particularly described hereinafter, all of which contribute to produce simple and efficient stroke-regulator for windmills. A'preferred embodiment of my invention will be described in the following specification, while the broad scope of my invention will be pointed out in the appended claims.

In the drawing, Figure 1 1s a rear elevation of a windmill mechanism showing the central portion of the wind wheel, certain parts of the mecha nism being broken away; V V

Fig. .2 is a vertical cross section through the arm atthe middle point; the view shows'the hub of the auxiliary wind wheel in Section;

Specification of Letters Patent. Pate t d M 17 .1921 Application filed J 'une 21, 1920. Serial No. 390,430. r

Fig. 3 is plan of the arm with the outer sectionor cover of the arm removed;

Fig. 4 1s a cross section through the hub of the auxiliary wheeland illustrating the manner in which a spring ismounted there- 1n; and I Fig. 5 is a section taken on the line 55 of Fig. 3 but showingthe bolt in place instead of removed as in Fig. 3. i

Referring more particularly to the parts;

1. represents the shaft ofthe main wind' wheel,the central portion of which is indicated by the dotted lines at 2. This shaft 1 1S rotatably mounted in asuitable bearing 3 which has a downward extensioriA: which may be mounted to swivel in a bearing in any suitable manner toenable the wind wheel 2 to be held in a plane substantially at rlght angles to the direction of the wind. One'end of the shaft l carries a circular head 5 to which there 'isattached a crank arm 6 and thiscrank arm is preferably constructed of two sectionsfi. and 6 which are clamped together' and secured to the head 5 short throughbolts 8, (seeFigs. 1 and 5).

On this arm'6 there is guided 'a crank pin 9 with which there is associated threaded adthe end of the shaft 1. The auxiliary wheel 11 is preferably formed with a hollow hub 12 which is connectedto the shaft l'b'y means ofa spiral sprin'g 1 3; [It should be understood that the auxiliary wheel is in front of the'mainwindwheelso that the wind comes 'by long through bolts? (see Fig. 2) and i against it in thedirection of the arrowsim dicatedin Fig. 2.. The effect of the wind is to rotate the auxiliary wind wheel in the same direction as the mainwind wheel. 3 The spring-'13 is'm'ounted in such a way that if an acceleration ofrotation of the'auxiliary wheel takes place, the tension in the spring 13 will beincreased; in other words, if the wind becomes stronger there will be'a relative angularadvance of the auxiliary wheel 11 with respect to the mainwind. wheel.

This relative movement is utilized by means of an inner shaft 14: which isrig idly; secured [to the hub 12 and which lies within the main shaft 1 which is made of tubular form." Any suitable means is provided for connecting the inner shaft 1% with the adjusting means 10 to utilize this relative movement, the operation being such that when the wind velocity increases the adjusting means 10 will be actuated in amanner to move the crank pin 9 further away from the shaft 1. This will increase the stroke of the pump, the plunger of which is actuated by a connecting rod 15 attached to the crank pin, (see Fig. 1).

In order to accomplish these effects I prevfor to construct the twosections 6 and 6" cross head 17. In the present instance these worm wheels are constructed so that theyv operate as nuts on the threads of the two feed screws or ad usting screws 20. For

convenience the hubs of these worm wheels.

are mounted in suitable ballbearing collars 21 whlch are received 111 sockets 22 formed in the adjacent faces of the two arm sec-:

tions 6 and 6}, and the sides of these collars 21 may be provided w th dowel screws 2% which assist in securing the collars in place.

Theascrews 20 extend beyondthe collars 21 and are secured to a cross head in the form of a yoke 25 (see l 3). On the shaft 14: between the two worm wheels 19 a worm 26 is mounted. This worm meshes with both of the worm wheels (see Fig. 2) and rotates them in opposite directions. lVith this cenl struction it will be evident that. an increase ofwind velocity will cause an outward adjusting movement of the crank pin9 and a reduct on ofwind velocity will cause an' inward movement of the crank pin 9 on the crank arm 6; in this way the stroke of the pump will be automatically changed or; regulated to adapt it to the\power being developed by the main wind wheel. The crank pin 9 projects through a slot 27 in the outer wall of the outer arm section 6 and in order to protect the interior of the crank arm from. the weather this slot is closed, or substantially closed by a slide in the form of a plate 28, theedges of which slide along under parallel cleats 29. i y

In order to provide clearance for the connecting rod 15,the outer ends of the bolts 7 are countersunk into the wall of the casing. The special bolts 8 are also countersunk into the wall of the arm sectionfi in order to prevent their interfering withthe free movement of the cross heads 17 and 25...

It is understood that the embodiment of the invention described herein is only one i of the many embodiments my invention may take,and I do not wish to be limited in the practice of my invention nor in my claims,

to the particular embodiment set forth.

' What I claim is 1.' In an automatic stroke-regulator for a windmill, the combination of a shaft forthe ma in wind wheel, a crank arm carried by the shaft, a crank pin guided in sand crank arm and adapted to be attached to the connecting rod that actuates the pump, threaded ad usting means. mounted 1n the crank arm for'moving the crank pin in or out on thearm, an auxiliary'lwind wheel roauxiliary wheel and cooperating with the threaded means for automatically adjusting the crank pin 011 the arm. V

2. In an automatic stroke-regulator for a windmill, the combination of ashaft for the main wind wheel, a crank arm carried by the shaft, a cross head carrying a crank pin and guided in the crank arm, said crank pin being adapted for attachment to a connecting rod to actuate a pump, threaded adjusting, means mounted in the crank arm and connected with the cross head for moving the same in or out on the arm, an auxiliary wind wheel r'otatably mounted on the axis of; the shaft, a spring connecting the same with the shaft and mounted so that the tension of the spring will be increased by an accelerated rotation ofthe auxiliary wheel, an inner shaft within the first named shaft and connected with the auxiliary wheel so as to be rotated thereby, and means on the inner shaft cooperating with the threaded adjusting means for automatically adjusting the cross head on the arm.

3. In an automatic stroke-regulator for a windmill, the combination of 'a shaft for the main wind wheel, a crank arm carried by the shaft, a crosshead carrying a crank pin and. gulded 1n the crank arm, sald crank pin being adapted for attachment to a connecting rodto actuate a pump, a' pairof feed screws mounted in the crank arm and connected with the cross head for moving the same in or out on the arm, an auxiliary wind wheel rotatably mounted on the axis of the shaft, a spring connecting the samewith the shaft, and mounted so that the tension of the spring will be increased by an accelerated rotation of the auxiliary wheel, aninner shaft within'the first named shaft and connected with the auxiliary wheel so as to be rotated thereby, and means carried bythe inner shaft, cooperating with the said feed screws for automatically adjusting the eross'liead on the arm} a. In an automatic stroke-regulator for a windmill, the combination of a shaft for the main wind wheel, a crank arm carried by the shaft, a cross head carrying a crank pin and guided in the crank arm, said crank pin being adapted for attachment to a connecting rod to actuate a pump, a pair of feed screws rigidly attached to the cross head, a nut corresponding to each feed'screw and rotatably mounted in the arm, each of said nuts being in the form of a worm wheel, a worm disposed between and engaging both of the worm wheels to rotate the same, an inner shaft within the first named shaft and carrying the said worm, an auxiliary wind wheel rigid with the inner shaft, and a spring connecting the auxiliary wind wheel with the first named shaft and mounted so that the tension of the spring will be increased by an accelerated rotation of the wind wheel.

5. In an automatic stroke-regulator for a wind mill, the combination of a shaft for the main wind wheel, a crank arm carried by the shaft and consisting of two sections clamped together and cooperating to form a substantially rectangular guideway therebetween, a pair of feed screws mounted in the guide way, a cross head movable along the guideway, attached to the two feed screws, and

carrying a crank pin adapted to be attached to a connecting rod that actuates a pump, said crank arm sections having recesses in their adjacent faces cooperating to form two pockets, a worm wheel in each of said pockets operating as a nut on its corresponding feed screw, a worm wheel held between the two arm-sections and meshing with the worm wheels to rotate the same, an lnner shaft carrying the worm wheel and disposed windmill, the combination of a shaft for the main wind wheel, a crank arm carried by the shaft and consisting of two sections clamped together and cooperating to form a substantially rectangular guideway therebetween, threaded adjusting means mounted in the guideway, a cross head movable along the guideway by the adjusting means, one of said sections having a slot therein, a crank pin carried by the cross head extending through the slot and adapted to be attached to a connecting rod for actuating a pump, a slide guided on the exterior of the crank arm for covering the said slot, an auxiliary wind wheel, a spring connecting the same with the first named shaft and mounted so that the tension therein will be increased by an acceleration of rotation of the auxiliary wheel, an inner shaft within the first named shaft and carrying the auxiliary wheel, and means actuated by the inner shaft and cooperating with the adjusting means to adjust the cross head Ill-01' out on the arm.

In testimony whereof, I have hereunto set my hand.

ALFRED B. SABIW. 

